Page title changes based on results per page

[BedInABox.com]

I have a product listing that allows customers to set a results per page option. This ads a GET variable to the URL. I've added the page number to the title of this page if they go past the first page. If this results per page variable is added to the URL then google see it as a different page. Do I need to change the page title for this?

[irvingw]

Sounds like a pagination question and you should follow Google's advice - http://googlewebmastercentral.blogspot.com/2012/03/video-about-pagination-with-relnext-and.html

In any event, customers shouldn't be the one deciding what to present to Google and you should block out the results  parameter in  Webmaster tools. Perhaps share your pages and I can give more direct advice.